usage: any recognized accomplishment; "they admired his performance under stress"; "when Roger Maris powered four home runs in one game his performance merits awe"

5. operation, functioning, performance, process, physical process

usage: process or manner of functioning or operating; "the power of its engine determines its operation"; "the plane's operation in high winds"; "they compared the cooking performance of each oven"; "the jet's performance conformed to high standards"